An authorized person may, for the purposes of a criminal investigation or the prosecution of an offence, apply ex parte to a Judge in Chambers for an order for the disclosure of—
(a) any data subject to a preservation order under section 16, irrespective of whether one or more service providers were involved in the transmission of that data;
(b) sufficient data referred to in paragraph (a) to identify the service providers and the path through which the data was transmitted;
(c) the password enabling access to the data referred to in paragraph (a); or
(d) the public key enabling the interpretation of data referred to in paragraph (a) that is in an asymmetric cryptosystem.